For loop (rarely used in Ruby) - Mini Project: Build & Apply

For loop (rarely used in Ruby)

📖 Scenario: You are helping a small bookstore organize its inventory. The store wants to list the names of some popular books it has in stock.

🎯 Goal: You will create a list of book titles, set up a counter for counting books, use a for loop to go through each book, and finally print each book's name.

📋 What You'll Learn

Create an array called books with the exact titles: 'The Hobbit', '1984', 'Pride and Prejudice'

Create a variable called count and set it to 0

Use a for loop with the variable book to iterate over books

Inside the loop, increment count by 1

Inside the loop, print the current book

After the loop, print the total number of books using count

💡 Why This Matters

🌍 Real World

Bookstores and libraries often need to list and count books in their inventory. Using loops helps automate this task.

💼 Career

Knowing how to loop through lists and count items is a basic skill for many programming jobs, including data processing and software development.

1

Create the list of books

Create an array called books with these exact titles: 'The Hobbit', '1984', 'Pride and Prejudice'

Ruby

# Create the array books with the given titles
# Your code here

Need a hint?

Use square brackets [] to create an array and separate items with commas.

2

Set up a counter

Create a variable called count and set it to 0

Ruby

books = ['The Hobbit', '1984', 'Pride and Prejudice']
# Create a variable count and set it to 0
# Your code here

Need a hint?

Just write count = 0 to start counting from zero.

3

Use a for loop to go through each book

Use a for loop with the variable book to iterate over books. Inside the loop, increase count by 1 and print the current book

Ruby

books = ['The Hobbit', '1984', 'Pride and Prejudice']
count = 0
# Use a for loop with book to go through books
# Inside the loop, add 1 to count and print book
# Your code here

Need a hint?

Use for book in books to start the loop, count += 1 to add one, and puts book to print.

4

Print the total number of books

After the loop, print the total number of books using count with puts

Ruby

books = ['The Hobbit', '1984', 'Pride and Prejudice']
count = 0
for book in books
  count += 1
  puts book
end
# Print the total count of books
# Your code here

Need a hint?

Use puts "Total books: #{count}" to show the total count.